here's one example where app store policy disrupted one platform and thousands of people's lives: tumblr. the way it played out ended up very directly impacting online communities and creators. even those who might've been not as directly affected by policy changes, still end up getting disrupted by shifts in audience. those appstores end up affecting users well outside of where their reach supposedly ends, not limited to the actual customers of those appstores. they continuously engage in censorship, and it doesn't stop at 'good censorship', it can be opinionated, prudish, or materialistic and self-serving (such as, prohibiting apps from telling people that they can subscribe directly, instead of going through the appstore). personally I don't need a frigid nanny with a hollier-than-thou 'let us decide for you' attitude. but even when you pick a platform that won't involve being beholden to such decisions, you still end up getting fallout from other platforms that do make decisions like that, even though you're not using them. and this is why it's worth raising a huge stink about monopolistic control over platforms. some policy decisions end up spreading to everyone, no matter what platform they use.
with vague talk about twitter possibly getting some kind of boot from appstores, which will invariably result in some kind of act of censorship to mold it to fit the appstore policies, i don't really get how one could go 'yeah, these things aren't actually impacting people in their day-to-day life'. they absolutely do. literally all of those things mentioned are playing out in real time for twitter and people who use it or affected by it in some kind of way. which turns out to be increasingly everyone.